Method of making rollers or wheels.



ELKLAHN. METHOD 0? MAKING ROLLERS 0R WHEELS. APPLICATION PJIILED OUT. 7, 1908. V 928,036 Patented Dec. 6, 1910.

. ill/174 v PATENT orrron'.

EMIL KLAHN, OF WEEHA'WI KEN, NEW J ERSE Y, ASSIG-I\T(R T0 BARNEY & BERRY,

INCORPORATED, 013 SPRING-FIELD, MASSACHUSETTS, A CORPORATION OF MASSA- CHUSETTS.

METHOD OF MAKING ROLLERS OR To all whom it may concern:

Be it known that I, EMIL KLAHN, acitizen of the United States, residing at Weehawken, in the county of Hudson and State of New Jersey, have invented certain new and useful Improvements in Methods of Making Rollers or Wheels, of which the following is a specification.

This invention relates to the method of making rollers for roller skates and the like.

It has for its object the provision of a metallic roller of great strength and li htness which can beproduced rapidly an at small cost.

In the accompanying drawings, formin the invention as embodied in a roller adapted for ballbearings, but it is obvious that such bearings may be dispensed withv and plain bearings employed instead.

In the drawing, Fi re 1 .is a view of a metal blank for the o rmation of the rim and web of the roller. Fig. 2 is a sectional view showing the blank formed into a cup with the center punched out. Fig. 3 is a sectional view of the web of the roller immediately after being punched out of the cup shown in Fig.2. Fig. 4 is a sectional --v1ew of the rim of the roller which is formed from the side or wall of thecup shown in Fig. 2/ Fig. 5 is a sectional view throu h the web and rim arranged in position t br the operation ofthe assemblin dies. Fig. 6 is a sectional View of the orm of hub used in the roller when considered with ball bearin s. Fig. 7 .is a sectional viewthrough the roller after the action of the assembling dies, with the die shown in position above and below the roller. The improved roller forming the present invention comprises a rim, a hub, and a web connecting the rim and the hub. The rim and web are preferably formed from sheet metal for the sake of cheapness, and the hub may be a forging, a casting, or it may be turned from a bar as preferred. In the production of the improved roller, the rim and web are preferably obtained from a circular blank of steel of suitable gage. This blank is formed by dicsyinto a cup, as illus trated in Fig. 2, the side or wall 2 of the cup being parallel to its axis, as shown, and the base 3 being formed with a central opening Specification of Letters Patent. Application filed October 7, 1908. Serial No. 456,677.

Patented Dec. 6, 1910.

4, and being raised in the center for reasons wh ch will presently appear. After the formation ofthe cup as shown in Fig. 2, the base or bottom of the cup is punched out and presents the formshown in Fig. 3. The side or wall of the cup 2 is then grooved circumferentially oii its inner surface as shown at 5 in Fig. 4, and after the grooving operation is ready to serve 'as the rim of the roller. The rim and web are brought into proper relation as shown in Fig. 5, and the hub 6 is then introduced within the opening 4 of the web. The three parts are then assembled between coiiperating dies 7 which act upon the web 3 to flatten it and expand it both outwardly and inwardly, so that it completely fills the groove5 formed in the inner surface of the rim ofthe roller and a smaller groove 8 formed on the outer surface of the hub 6. The relation of the parts after trite aption of these dies is clearly shown in In the construction of the improved roller it will be understood that the material used in forming the web and the rim must be of sufficient ductility to be readily formed by dies, Whereas the hub must be made of material hard enough to withstand wear. Ordinarily, I use hot rolled sheet steel for the manufacture of the rim and Web, and for the hub, I use machine steel which is turned to the proper form, and case-hardened to make it stand wear.

Having thus described my invention, what claim is new, and desire to secure by Lettcrs Patent is: a The method of producing a roller for roller skates or the like consisting in forming a cup with the bottom raised in the center, punching the bottom out of said cup, forming a central hole in the bottom of said. cup, introducing the punched out bottom of tie cup within a wall of the cup, introducing the hub into the opening formed in the center of the bottom of the cup, and expanding the bottom of the cup into engagement with the wall thereof and the hub. v

In testimony whereof, I have signed my name in the presence of witnesses.

I EMIL KTIAIIN. 

